Soft-luster rayon



Patented Feb. 11, 1936 PATENT OFFICE SOFT-LUSTER RAYON I tudolph S.Bley, Elizabethton, Tenn, assignor to North American Rayon Corporation,New York, N. Y., a corporation of Delaware No Drawing. ApplicationOctober 25, 1934, Serial No. 750,015

8 Claims.

The present invention relates to a process of preparing cellulosicspinning solutions soft-luster products may be produced having the fromwhich property of filtering out ultra-violet rays.

The primary object of my invention has to do with the incorporation ofsuch compounds into viscose and cuprammonium cellulose solutions to formtherefrom soft-luster, ultra-violet ray-filtering products.

Another object of this invention has to do with the incorporation of acompound of the group consisting of triphenyl stibine, triphenylbismuthine, phthalimide and p-aminobenzoie acid intoviscose andcuprammonium cellulose solutions for the aforementioned purpose.

Athird object of my invention relates to the' manufacture of novelproducts per se, namely soft-luster, regenerated cellulose containing anu tra-violet ray-filtering substance.

Other objects of my invention will become apparent to those skilled inthe art after a study of the following specification.

1 am well aware that it has, heretofore, been proposed to producesoft-luster rayon by incorporating inorganic and organic pigments,etc.,'into cellulosic spinning solutions prior to the extrusion thereof.I am also aware that cellulosic products have, heretofore, been renderedresistant to ultraviolet rays bydyeing them with suitable dyes. However,I believe to be the first one to manufacture substantially white,soft-luster rayon having the property of filtering out ultra-violetrays. This, unexpectedly, is accomplished by delustering agents of thegroup consisting of triphenyl stibine, .triphenyl bismuthine,phthalimide and .p-amino-benzoic acid. The following table depicts thechemical characteristics of these agents:

Cellulosic spinning solutions, containing one or a plurality of thesecompounds, may be spun in conventional manner to form filaments andyarns which subsequently may be woven into textiles,

etc. Wearing-apparel, manufactured from such textile materials, willeffectively prevent the for- 'mation of sun-burns on the skin ofhumanbeings wearing it.

My novel delustering agents may be dissolved and/or dispersed inconventional viscose and cuprammonium cellulose solutions. The amountsof delustering agent, to be distributed in these cellulose solutions,may be varied at will, although about 0.5 to 10.0% is sufllcient toproduce ultraviolet ray-filtering yarns, these percentages being basedupon the cellulose content of the spinning solutions. Inorganic andorganic pigments, solvents, etc., may. be admixed with the viscose andcuprammonium cellulose solutions before spinning to vary the chemicaland physical characteristics of the finished products. It is to be notedthat ordinary rayon goods may be impregnated with my novel agents torender them impregnable to ultra-violet rays. In this manner,

it is possible to retain the natural luster of rayon.

Modifications of my process will readily be recognized by those skilledin the art, and I desire to include all modifications falling within thescope of the appended claims.

I claim:

1. A spinning solution for the manufacture of soft-luster, ultra-violetray-filtering artificial silk comprising a solution of the groupconsisting of viscose and cuprammonium cellulose and a compound of thegroup consisting of triphenyl stibine, triphenyl bismuthine, phthalimideand p-aminobenzoic acid.

2. A spinning solution for the manufacture of soft-luster, ultra-violetray-filtering artificial silk comprising a solution of the groupconsisting of viscose and cuprammonium cellulose and about 0.5 to 10.0%of a compound of the group consisting of triphenyl stibine, triphenylbismuthine, phthalimide and p-aminobenzolc acid, said percentages beingbased upon the cellulose content ,of said solution.

3. A spinning solution for the manufacture of soft-luster, ultra-violetray-filtering artificial silk comprising a solution of the groupconsisting of viscose and cuprammonium cellulose together with triphenylstibine.

4. A spinning solution for the manufacture of soft-luster ultra-violetray-filtering artificial silk comprising a. solution of the groupconsisting of viscose and cuprammonium cellulose together withphthalimide.

5. A spinning solution for the manufacture of soft-luster, ultra-violetray-filtering artificial silk comprising a solution of the groupconsisting of viscose and cuprammonium cellulose together withp-aminobenzoic acid.

6. A spinning solution for the manufacture of soft-luster, ultra-violetray-filtering artificial silk comprising a solution of the groupconsisting of viscose and cuprammonium cellulose together silk.comprising a. solution of the group consisting of viscose andcuprammonium cellulose together with about 0.5 to 10.0% of phthalimide,said percentage being based upon the cellulose content of said solution.

8. A spinning'solution for the manufacture of 5 soft luster,ultra-violet ray-filtering artificial silk comprising a solution of thegroup consisting of viscose and cuprammonium cellulose together withabout 0.5 to 10.0% of p-aminobenzoic acid, said percentage being basedupon the cellu- 10 lose content of said solution.

RUDOLPH S. BLEY.

